mythtv-setup - second run of channel scan results in duplicate channels

[Mike Bibbings]

Running mythtv-setup Input Connections scan for channels (Full scan) on DVB-T device (Astrometa usb) results in duplicate channels when a second scan is run. It seems that the original channels are not being recognised and the newly found channels are added instead of being updated.

Attachments: first-scan-mythtv-setup.20190320085633.3825.log

second-scan-mythtv-setup.20190320102218.7336.log

mythtv-setup-multiple-scan-results.txt - details mythtv-version and various tables channel,capturecard, dtv_multiplex

[Mike Bibbings]

Similar issue with TBS 6522 PCI-e DVB-T2 tuner, although in this case not all channels are duplicated.

Attachments:

first-scan-t2-mythtv-setup.20190320111256.10060.log.tar.bz2

second-scan-t2-mythtv-setup.20190320112358.10650.log.tar.bz2

mythtv-setup-multiple-scan-results-t2.txt - details mythtv-version and various tables channel,capturecard, dtv_multiplex

[Mike Bibbings]

Should have mentioned this is for current master. Can't change ticket header to show this.

Mike

[Klaas de Waal]

Problem can be reproduced now on DVB-T2 with a "Full Scan". A "Scan of all existing transports" is OK.

[Klaas de Waal <kdewaal@…>]

In b8141c84cb/mythtv:

Error: Processor CommitTicketReference failed

GIT backend not available

[jpilk]

Last week I went away with my DVB-T dongle and forgot to bring it back. So I got a MyGica T230 and now have that working together with an old DVB-T-only pci card. I have DVB-T and DVB-T/T2 video sources, and what I believe to be complete scans, restricted to known muxes, with each. Only the local QPSK mux is seen twice. I seem to need active EIT for both cards.

At present for T2 I have to 'Prefer' the T2-capable card. While things are in a state of flux this seems worth mentioning; perhaps there's an existing solution.

F28, 31.Pre.224.g4a2be05

[Mike Bibbings]

Replying to Klaas de Waal <kdewaal@…>:

In b8141c84cb/mythtv:

Error: Processor CommitTicketReference failed

GIT backend not available

Confirmed as fixed for DVB-T/T2 capable tuner, not fixed for DVB-T only tuner.

I note that dtv_multiplex mod_sys is set to UNDEFINED, rather than DVB-T. For a DVB-T/T2 capable tuner mod_sys is set to either DVB-T or DVB-T2 as appropriate

Attachments:

dvb-t-scans-mythtv-setup.20190322103440.5235.log.tar.bz2

dvb-t-scans-results.txt

[Klaas de Waal <kdewaal@…>]

In d0208428b/mythtv:

Error: Processor CommitTicketReference failed

GIT backend not available

[Klaas de Waal]

A fix to set the modulation system also for DVB-T tuners has been committed. As there is here only a DVB-T2 signal since two weeks this fix has not been tested other than that DVB-T2 still works.

About active EIT. Each video source needs its own EIT, although it should not need to be active.

About tuner preferences. Having two different video sources each with its own channels is not a problem. It becomes interesting when the same channel is available on both video sources; they will then appear in the guide as one channel and then it depends on tuner priorities/preferences which one will be used when that channel is selected.